git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl_still.c

   1 /*
   2  * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         pthread_t thread;
  44         int joined;
  45         int running;
  46         int window_width;
  47         int window_height;
  48         int width;
  49         int height;
  50         int playing;
  51         int sdl_flags;
  52         SDL_Surface *sdl_screen;
  53         SDL_Rect rect;
  54         uint8_t *buffer;
  55         int last_position;
  56         mlt_producer last_producer;
  57         int filtered;
  58 };
  59
  60 /** Forward references to static functions.
  61 */
  62
  63 static int consumer_start( mlt_consumer parent );
  64 static int consumer_stop( mlt_consumer parent );
  65 static int consumer_is_stopped( mlt_consumer parent );
  66 static void consumer_close( mlt_consumer parent );
  67 static void *consumer_thread( void * );
  68 static int consumer_get_dimensions( int *width, int *height );
  69 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  70
  71 /** This is what will be called by the factory - anything can be passed in
  72         via the argument, but keep it simple.
  73 */
  74
  75 mlt_consumer consumer_sdl_still_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  76 {
  77         // Create the consumer object
  78         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  79
  80         // If no malloc'd and consumer init ok
  81         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  82         {
  83                 // Get the parent consumer object
  84                 mlt_consumer parent = &this->parent;
  85
  86                 // get a handle on properties
  87                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
  88                 this->properties = MLT_SERVICE_PROPERTIES( service );
  89
  90                 // We have stuff to clean up, so override the close method
  91                 parent->close = consumer_close;
  92
  93                 // Default scaler (for now we'll use nearest)
  94                 mlt_properties_set( this->properties, "rescale", "nearest" );
  95
  96                 // We're always going to run this in non-realtime mode
  97                 mlt_properties_set( this->properties, "real_time", "0" );
  98
  99                 // Default progressive true
 100                 mlt_properties_set_int( this->properties, "progressive", 1 );
 101
 102                 // Ensure we don't join on a non-running object
 103                 this->joined = 1;
 104
 105                 // process actual param
 106                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 107                 {
 108                         this->width = mlt_properties_get_int( this->properties, "width" );
 109                         this->height = mlt_properties_get_int( this->properties, "height" );
 110                 }
 111                 else
 112                 {
 113                         mlt_properties_set_int( this->properties, "width", this->width );
 114                         mlt_properties_set_int( this->properties, "height", this->height );
 115                 }
 116
 117                 // Set the sdl flags
 118                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 119
 120                 // Allow thread to be started/stopped
 121                 parent->start = consumer_start;
 122                 parent->stop = consumer_stop;
 123                 parent->is_stopped = consumer_is_stopped;
 124
 125                 // Register specific events
 126                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 127
 128                 // Return the consumer produced
 129                 return parent;
 130         }
 131
 132         // malloc or consumer init failed
 133         free( this );
 134
 135         // Indicate failure
 136         return NULL;
 137 }
 138
 139 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 140 {
 141         if ( listener != NULL )
 142                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 143 }
 144
 145 static int consumer_start( mlt_consumer parent )
 146 {
 147         consumer_sdl this = parent->child;
 148
 149         if ( !this->running )
 150         {
 151                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 152                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 153
 154                 // Attach a colour space converter
 155                 if ( !this->filtered )
 156                 {
 157                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
 158                         mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
 159                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 160                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 161                         mlt_filter_close( filter );
 162                         this->filtered = 1;
 163                 }
 164
 165                 consumer_stop( parent );
 166
 167                 this->last_position = -1;
 168                 this->running = 1;
 169                 this->joined = 0;
 170
 171                 // Allow the user to force resizing to window size
 172                 this->width = mlt_properties_get_int( this->properties, "width" );
 173                 this->height = mlt_properties_get_int( this->properties, "height" );
 174
 175                 // Default window size
 176                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 177                 this->window_width = ( double )this->height * display_ratio;
 178                 this->window_height = this->height;
 179
 180                 if ( sdl_started == 0 && preview_off == 0 )
 181                 {
 182                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 183                         {
 184                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 185                                 return -1;
 186                         }
 187
 188                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 189                         SDL_EnableUNICODE( 1 );
 190                 }
 191                 else if ( preview_off == 0 )
 192                 {
 193                         if ( SDL_GetVideoSurface( ) != NULL )
 194                         {
 195                                 this->sdl_screen = SDL_GetVideoSurface( );
 196                         }
 197                 }
 198
 199                 if ( this->sdl_screen == NULL && preview_off == 0 )
 200                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 201
 202                 pthread_create( &this->thread, NULL, consumer_thread, this );
 203         }
 204
 205         return 0;
 206 }
 207
 208 static int consumer_stop( mlt_consumer parent )
 209 {
 210         // Get the actual object
 211         consumer_sdl this = parent->child;
 212
 213         if ( this->joined == 0 )
 214         {
 215                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 216                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 217
 218                 // Kill the thread and clean up
 219                 this->running = 0;
 220
 221                 pthread_join( this->thread, NULL );
 222                 this->joined = 1;
 223
 224                 if ( sdl_started == 0 && preview_off == 0 )
 225                         SDL_Quit( );
 226
 227                 this->sdl_screen = NULL;
 228         }
 229
 230         return 0;
 231 }
 232
 233 static int consumer_is_stopped( mlt_consumer parent )
 234 {
 235         consumer_sdl this = parent->child;
 236         return !this->running;
 237 }
 238
 239 static int sdl_lock_display( )
 240 {
 241         SDL_Surface *screen = SDL_GetVideoSurface( );
 242         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 243 }
 244
 245 static void sdl_unlock_display( )
 246 {
 247         SDL_Surface *screen = SDL_GetVideoSurface( );
 248         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 249                 SDL_UnlockSurface( screen );
 250 }
 251
 252 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 253 {
 254         // Generate the affine transform scaling values
 255         int scale_width = ( width << 16 ) / rect.w;
 256         int scale_height = ( height << 16 ) / rect.h;
 257         int stride = width * 3;
 258         int x, y, row_index;
 259         uint8_t *q, *row;
 260
 261         // Constants defined for clarity and optimisation
 262         int scanlength = screen->pitch;
 263         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 264         uint8_t *p;
 265
 266         // Iterate through the screen using a very basic scaling algorithm
 267         for ( y = 0; y < rect.h; y ++ )
 268         {
 269                 p = start;
 270                 row_index = ( 32768 + scale_height * y ) >> 16;
 271                 row = image + stride * row_index;
 272                 for ( x = 0; x < rect.w; x ++ )
 273                 {
 274                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 275                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 276                 }
 277                 start += scanlength;
 278         }
 279 }
 280
 281 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 282 {
 283         // Generate the affine transform scaling values
 284         int scale_width = ( width << 16 ) / rect.w;
 285         int scale_height = ( height << 16 ) / rect.h;
 286         int stride = width * 3;
 287         int x, y, row_index;
 288         uint8_t *q, *row;
 289
 290         // Constants defined for clarity and optimisation
 291         int scanlength = screen->pitch / 2;
 292         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 293         uint16_t *p;
 294
 295         // Iterate through the screen using a very basic scaling algorithm
 296         for ( y = 0; y < rect.h; y ++ )
 297         {
 298                 p = start;
 299                 row_index = ( 32768 + scale_height * y ) >> 16;
 300                 row = image + stride * row_index;
 301                 for ( x = 0; x < rect.w; x ++ )
 302                 {
 303                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 304                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 305                 }
 306                 start += scanlength;
 307         }
 308 }
 309
 310 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 311 {
 312         // Generate the affine transform scaling values
 313         int scale_width = ( width << 16 ) / rect.w;
 314         int scale_height = ( height << 16 ) / rect.h;
 315         int stride = width * 3;
 316         int x, y, row_index;
 317         uint8_t *q, *row;
 318
 319         // Constants defined for clarity and optimisation
 320         int scanlength = screen->pitch;
 321         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 322         uint8_t *p;
 323         uint32_t pixel;
 324
 325         // Iterate through the screen using a very basic scaling algorithm
 326         for ( y = 0; y < rect.h; y ++ )
 327         {
 328                 p = start;
 329                 row_index = ( 32768 + scale_height * y ) >> 16;
 330                 row = image + stride * row_index;
 331                 for ( x = 0; x < rect.w; x ++ )
 332                 {
 333                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 334                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 335                         *p ++ = (pixel & 0xFF0000) >> 16;
 336                         *p ++ = (pixel & 0x00FF00) >> 8;
 337                         *p ++ = (pixel & 0x0000FF);
 338                 }
 339                 start += scanlength;
 340         }
 341 }
 342
 343 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 344 {
 345         // Generate the affine transform scaling values
 346         int scale_width = ( width << 16 ) / rect.w;
 347         int scale_height = ( height << 16 ) / rect.h;
 348         int stride = width * 3;
 349         int x, y, row_index;
 350         uint8_t *q, *row;
 351
 352         // Constants defined for clarity and optimisation
 353         int scanlength = screen->pitch / 4;
 354         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 355         uint32_t *p;
 356
 357         // Iterate through the screen using a very basic scaling algorithm
 358         for ( y = 0; y < rect.h; y ++ )
 359         {
 360                 p = start;
 361                 row_index = ( 32768 + scale_height * y ) >> 16;
 362                 row = image + stride * row_index;
 363                 for ( x = 0; x < rect.w; x ++ )
 364                 {
 365                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 366                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 367                 }
 368                 start += scanlength;
 369         }
 370 }
 371
 372 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 373 {
 374         // Get the properties of this consumer
 375         mlt_properties properties = this->properties;
 376
 377         mlt_image_format vfmt = mlt_image_rgb24;
 378         int height = this->height;
 379         int width = this->width;
 380         uint8_t *image = NULL;
 381         int changed = 0;
 382         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 383
 384         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 385         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 386
 387         if ( lock != NULL ) lock( );
 388
 389         sdl_lock_display();
 390
 391         // Handle events
 392         if ( this->sdl_screen != NULL )
 393         {
 394                 SDL_Event event;
 395
 396                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 397
 398                 while ( SDL_PollEvent( &event ) )
 399                 {
 400                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 401
 402                         switch( event.type )
 403                         {
 404                                 case SDL_VIDEORESIZE:
 405                                         this->window_width = event.resize.w;
 406                                         this->window_height = event.resize.h;
 407                                         changed = 1;
 408                                         break;
 409                                 case SDL_QUIT:
 410                                         this->running = 0;
 411                                         break;
 412                                 case SDL_KEYDOWN:
 413                                         {
 414                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 415                                                 char keyboard[ 2 ] = " ";
 416                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 417                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 418                                                 {
 419                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 420                                                         callback( producer, keyboard );
 421                                                 }
 422                                         }
 423                                         break;
 424                         }
 425                 }
 426         }
 427
 428         if ( this->sdl_screen == NULL || changed )
 429         {
 430                 // open SDL window
 431                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 432                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 433                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 434                 changed = 1;
 435         }
 436         else
 437         {
 438                 changed = 1;
 439         }
 440
 441         if ( changed == 0 &&
 442                  this->last_position == mlt_frame_get_position( frame ) &&
 443                  this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
 444         {
 445                 sdl_unlock_display( );
 446                 if ( unlock != NULL ) unlock( );
 447                 return 0;
 448         }
 449
 450         // Update last frame shown info
 451         this->last_position = mlt_frame_get_position( frame );
 452         this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
 453
 454         // Get the image, width and height
 455         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 456         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 457
 458         if ( image != NULL )
 459         {
 460                 char *rescale = mlt_properties_get( properties, "rescale" );
 461                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 462                 {
 463                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 464                         this->rect.w = this_aspect * this->window_width;
 465                         this->rect.h = this->window_height;
 466                         if ( this->rect.w > this->window_width )
 467                         {
 468                                 this->rect.w = this->window_width;
 469                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 470                         }
 471                 }
 472                 else
 473                 {
 474                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 475                         this->rect.w = frame_aspect * this->window_height;
 476                         this->rect.h = this->window_height;
 477                         if ( this->rect.w > this->window_width )
 478                         {
 479                                 this->rect.w = this->window_width;
 480                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 481                         }
 482                 }
 483
 484                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 485                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 486
 487                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 488                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 489                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 490                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 491         }
 492
 493         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 494         {
 495                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 496
 497                 switch( this->sdl_screen->format->BytesPerPixel )
 498                 {
 499                         case 1:
 500                                 display_1( this->sdl_screen, this->rect, image, width, height );
 501                                 break;
 502                         case 2:
 503                                 display_2( this->sdl_screen, this->rect, image, width, height );
 504                                 break;
 505                         case 3:
 506                                 display_3( this->sdl_screen, this->rect, image, width, height );
 507                                 break;
 508                         case 4:
 509                                 display_4( this->sdl_screen, this->rect, image, width, height );
 510                                 break;
 511                         default:
 512                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 513                                 break;
 514                 }
 515
 516                 // Flip it into sight
 517                 SDL_Flip( this->sdl_screen );
 518         }
 519
 520         sdl_unlock_display();
 521
 522         if ( unlock != NULL ) unlock( );
 523
 524         return 1;
 525 }
 526
 527 /** Threaded wrapper for pipe.
 528 */
 529
 530 static void *consumer_thread( void *arg )
 531 {
 532         // Identify the arg
 533         consumer_sdl this = arg;
 534
 535         // Get the consumer
 536         mlt_consumer consumer = &this->parent;
 537         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 538
 539         // internal intialization
 540         mlt_frame frame = NULL;
 541         mlt_image_format vfmt = mlt_image_rgb24a;
 542         int height = this->height;
 543         int width = this->width;
 544         uint8_t *image = NULL;
 545
 546         // Allow the hosting app to provide the preview
 547         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 548         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 549
 550         // Check if a specific colour space has been requested
 551         if ( preview_off && preview_format != mlt_image_none )
 552                 vfmt = preview_format;
 553
 554         // Loop until told not to
 555         while( this->running )
 556         {
 557                 // Get a frame from the attached producer
 558                 frame = mlt_consumer_rt_frame( consumer );
 559
 560                 // Ensure that we have a frame
 561                 if ( this->running && frame != NULL )
 562                 {
 563                         if ( preview_off == 0 )
 564                         {
 565                                 consumer_play_video( this, frame );
 566                         }
 567                         else
 568                         {
 569                                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 570                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 571                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 572                         }
 573                         mlt_frame_close( frame );
 574                 }
 575                 else
 576                 {
 577                         if ( frame ) mlt_frame_close( frame );
 578                         this->running = 0;
 579                 }
 580         }
 581
 582         return NULL;
 583 }
 584
 585 static int consumer_get_dimensions( int *width, int *height )
 586 {
 587         int changed = 0;
 588
 589         // SDL windows manager structure
 590         SDL_SysWMinfo wm;
 591
 592         // Specify the SDL Version
 593         SDL_VERSION( &wm.version );
 594
 595         // Get the wm structure
 596         if ( SDL_GetWMInfo( &wm ) == 1 )
 597         {
 598 #ifndef __DARWIN__
 599                 // Check that we have the X11 wm
 600                 if ( wm.subsystem == SDL_SYSWM_X11 )
 601                 {
 602                         // Get the SDL window
 603                         Window window = wm.info.x11.window;
 604
 605                         // Get the display session
 606                         Display *display = wm.info.x11.display;
 607
 608                         // Get the window attributes
 609                         XWindowAttributes attr;
 610                         XGetWindowAttributes( display, window, &attr );
 611
 612                         // Determine whether window has changed
 613                         changed = *width != attr.width || *height != attr.height;
 614
 615                         // Return width and height
 616                         *width = attr.width;
 617                         *height = attr.height;
 618                 }
 619 #endif
 620         }
 621
 622         return changed;
 623 }
 624
 625 /** Callback to allow override of the close method.
 626 */
 627
 628 static void consumer_close( mlt_consumer parent )
 629 {
 630         // Get the actual object
 631         consumer_sdl this = parent->child;
 632
 633         // Stop the consumer
 634         mlt_consumer_stop( parent );
 635
 636         // Now clean up the rest
 637         mlt_consumer_close( parent );
 638
 639         // Finally clean up this
 640         free( this );
 641 }